Intensity of electromagnetic wave is given as
![I = 2[\frac{B_{rms}^2}{2\mu_0}\times c]](https://tex.z-dn.net/?f=I%20%3D%202%5B%5Cfrac%7BB_%7Brms%7D%5E2%7D%7B2%5Cmu_0%7D%5Ctimes%20c%5D)
given that


here we know that


now we have


now we will have


frequency of wave is given as


now the induced EMF is given as



Answer:
80kg = 133 Newtons I'm pretty sure this is right.
Energy in a spring:
E = 0.5 * k * x²
k spring constant = 800 n/m
x stretch of the spring = 5 cm = 0.05 m
E = 0.5 * 800 * 0.05² = 1
3.4m/s
Explanation:
Given parameters:
Distance to school = 14.4km
Time taken by Amy = 49min
Time taken by bill = 20min after Amy = 20+49 = 69min
Unknown parameters:
How much faster is Amy's average speed = ?
Solution:
Average speed is the rate of change of total distance with total time taken.
Average speed = 
convert units to meters and seconds
1000m = 1km
60s = 1min
Distance to school = 14.4 x 1000 = 14400m
Time taken by Amy = 49 x 60 = 2940s
Time taken by Bill = 69 x 60 = 4140s
Average speed of Amy =
= 4.9m/s
Average speed of Bill =
= 1.4m/s
Differences in speed = 4.9 - 1.5 = 3.4m/s
Amy was 3.4m/s faster than Bill
learn more:
Average speed brainly.com/question/8893949
#learnwithBrainly
the above three pictures may help you
go through the attachments